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Finding the Fourth Proportional to 490.76, 736.24 and 399.23

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Solution

The fourth proportional to 490.76, 736.24 and 399.23 is: 598.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.76 : 736.24 = 399.23 : x
  2. Step 2: Convert to fraction form
    490.76/736.24 = 399.23/x
  3. Step 3: Cross multiply
    490.76x = 736.24 × 399.23
  4. Step 4: Simplify right side
    490.76x = 293,929.10
  5. Step 5: Solve for x
    x = 293,929.10/490.76
  6. Step 6: Final answer
    x = 598.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.